Anson Adams Mount IV (born February 25, 1973) is an American actor. He portrays the fictional character Cullen Bohannon in the AMC show Hell on Wheels. He was also cast in the role of Jim Steele on the short-lived NBC series Conviction and appeared in the film Tully (2000). He plays the Marvel Comics superhero Black Bolt in the Marvel Cinematic Universe show, Marvel's Inhumans (2017).